HVAC Excellence study guide
HVAC Excellence · Work through your exam, one topic at a time.
HVAC Excellence is the HVACR education and workforce standards program operated by ESCO Group, headquartered in Mt. It develops standards and resources that support the quality of education, training, credentialing, and workforce development across the HVACR and building science industries - including programmatic accreditation, a competency and task list framework used by educators, continuing education training recognition, and the National HVACR Education Conference. Its certification offerings are described as portable and stackable: students, technicians, contractors, and instructors can pursue progressive levels of certification at every stage of their careers, with exams offered at each level. The credential family spans Employment Ready exams, HEAT, Professional Level and Master Specialist certifications, Educator Credentialing exams (such as the Certified Master HVACR Educator), EPA Section 608 and 609 resources, and specialty certifications covering A3 hydrocarbon refrigerant safety, low GWP A2L mildly flammable refrigerants, system performance, residential heat load analysis, green awareness, duct and envelope testing, R-410A, and residential energy auditing. The HVAC Excellence study guide has 5 sections and about 2,452 words.
01Refrigeration Systems and Refrigerant Handling
The vapor-compression cycle is compression, condensation, metering, evaporation. The core skill is converting gauge readings to saturation temperatures on a PT chart, then comparing those saturation temperatures to measured line temperatures.
402 words, about 2 min02Electrical and Controls
Nearly every no-heat or no-cool call begins at the transformer. Ohm's law (E = I × R) lets you predict current through a contactor coil or gas valve and spot a transformer that is being overloaded.
392 words, about 2 min03Heating Systems and Combustion
Fuel, oxygen, and ignition, plus a path to vent products safely. Know typical pressures: natural gas manifold 3.5 in.
328 words, about 2 min04Air Distribution, Duct and Envelope Testing
Total external static pressure (TESP) is measured with a manometer between the supply plenum and the return plenum, with the filter, coil, and all components installed and the coil wet. Compare the reading to the blower performance table, not to a generic number.
665 words, about 3 min05System Performance, Efficiency and Troubleshooting
A performance check requires both sides. On the air side, total capacity = 4.5 × CFM × Δh , sensible capacity = 1.08 × CFM × ΔT , and latent capacity = 0.68 × CFM × Δgrains .
665 words, about 3 min